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Field Dependence of Dilute Ising Paramagnets
Author(s) -
Taggart G. B.
Publication year - 1990
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221570224
Subject(s) - condensed matter physics , ising model , magnetization , paramagnetism , magnetic field , physics , magnetic susceptibility , magnetism , operator (biology) , materials science , chemistry , quantum mechanics , biochemistry , repressor , transcription factor , gene
Quenched and annealed dilute, spin one‐half, Ising paramagnets are studied under the influence of an external magnetic field of arbitrary magnitude. Both cases are considered for non‐interacting and interacting magnetic species. The short range magnetic interactions are taken into account by using, to the first order in the interaction strength, the exponential operator technique introduced by Honmura and Kaneyoshi. The results clearly show the differences between the behavior of the magnetization and susceptibility as magnetic interactions are turned on for the quenched and annealed cases. For the annealed dilute paramagnet, the magnetization and concentration are calculated for arbitrary external field and chemical potential and, as expected, exhibit phase behavior similar to a three‐state, spin‐one, Ising model.